Friction closed container



W. F. PUNTE FRICTION CLOSED CONTAINER Filed May 14 1932 Patented Dec. 26, 1933 "UNITED STATES PATENT OFFICE 2 Claims. (Cl. 220-42) The invention relates to new and useful im-' provements in containers, and more particularly to a friction closed container.

An object of the invention is to provide a container with a friction closing means for securing the cover to the container whereby the cover is firmly held on the container and at the same time can be readily removed by hand.

A further object of the invention is to provide a friction closure for a container which is especially adapted for securing the cover to a container body which is irregular or elliptical in shape. v

In the drawing- Figure 1 is a plan view with parts broken away of a container embodying the invention;

Fig. 2 is a view partly in side elevation and partly in vertical cross section;

Fig. 3 is an enlarged sectional view on the line 3-3 of Fig. l, and

Fig. 4 is an enlarged sectional view on the line 44 of Fig. 3. w

The invention is shown applied to a container which is elliptical in shape. The container includes a body portion to which a bottom end is secured by seaming, and the upper edge portion of the body wall is rolled inwardly to form a closed bead which strengthens and gives rigidity to the upper edge of the wall of the container. The cover is provided with a depending flange which slips down outside of the container body. The

lower edge of the depending flange is rolled inwardly to form a closed head which greatly strengthens the lower edge of the cover flange and gives rigidity thereto. The bead on the cover flange is provided with spaced inwardly extending projections which are shaped and dimensioned so as to contact with the outer face of the wall of the container, and thus produce a tight frictional gripping engagement between the cover and the container body at spaced intervals. While these gripping projections will firmly hold the cover seated on the container, at the. same time, the

frictional contact is so limited'that the cover may has a depending flange 6 which slips down outside of the container body. Said flange is rolled inwardly to form a hollow closed bead which greatly strengthens the edge and gives rigidity thereto. The cover is shaped in a die, after which the edge portion is curled with a curling die to form the hollow bead. It is very diflicult to roll a bead so that it will make a tight frictional contact with the body portion of a container. After the bead is formed, it is subjected to dies for forming projections 8. Inasmuch as these projections are shaped by forming dies they can be accurately made and spaced so that the cover will snugly fit the container body, said projections frictionally contacting therewith. The projecting portions in the bead are indicated at 8 in the drawing. Three of these'are shown in Fig. 1, but it is understood that there are others and that they are equally spaced so as to provide a frictional grip on the body wall which will firmly secure thecover to the container body. It is even more difficult to shape the hollow bead at the edge of a cover to grip the wall of the container when the container is elliptical or oval in cross section. By forming the bead and projections as described above, the

von the container body, the extent of frictional to provide the projections, it will be understood that the curl'and projections may all be formed in one die forming operation. It is essential, however, that the projections shall be sized by forming dies, so as to bring about the proper frictional gripping engagement with the wall of the container body. a

It is obvious that minor changes in the details a of construction may be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described the invention, what I claim as'new and desire to secure by Letters- Patent, is-

1. A metal container comprising a body having the upper portion of the wall thereof rolled inwardly to form a closed hollow bead, and a cover having a depending flange, the lower edge portion of which is rolled inwardly to form a hollow closed bead, said bead on the cover having inwardly extending projections at spaced intervals on the inner face thereof adapted to frictionally grip the body wall of the container.

2. A metal container comprising a body having a substantially uniform elliptical horizontal cross section throughout, the wall of said body WM. F. PUNTE. 

